/*
 * Copyright 2002-2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.context.config;

import org.w3c.dom.Element;

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.parsing.BeanComponentDefinition;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.beans.factory.xml.BeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;

/**
 * {@link BeanDefinitionParser} responsible for parsing the
 * {@code <context:spring-configured/>} tag.
 *
 * @author Juergen Hoeller
 * @since 2.5
 */
class SpringConfiguredBeanDefinitionParser implements BeanDefinitionParser {

    /**
     * The bean name of the internally managed bean configurer aspect.
     */
    public static final String BEAN_CONFIGURER_ASPECT_BEAN_NAME =
            "org.springframework.context.config.internalBeanConfigurerAspect";

    static final String BEAN_CONFIGURER_ASPECT_CLASS_NAME =
            "org.springframework.beans.factory.aspectj.AnnotationBeanConfigurerAspect";


    @Override
    public BeanDefinition parse(Element element, ParserContext parserContext) {
        if (!parserContext.getRegistry().containsBeanDefinition(BEAN_CONFIGURER_ASPECT_BEAN_NAME)) {
            RootBeanDefinition def = new RootBeanDefinition();
            def.setBeanClassName(BEAN_CONFIGURER_ASPECT_CLASS_NAME);
            def.setFactoryMethodName("aspectOf");
            def.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
            def.setSource(parserContext.extractSource(element));
            parserContext.registerBeanComponent(new BeanComponentDefinition(def, BEAN_CONFIGURER_ASPECT_BEAN_NAME));
        }
        return null;
    }

}
